Taco Festival Profit Calculation

At the Taco Festival, each day the Chef handles different sales and expenditures. For every test case, you are given two integers: revenue \(X\) and cost \(Y\). Your task is to determine the net profit or loss for that day, computed as \(X - Y\).

The problem is simple yet fundamental, requiring you to implement a solution that reads the number of test cases followed by pairs of integers representing revenue and cost. For each pair, you should output the result of the subtraction on a new line.

inputFormat

The input is given via standard input (stdin). The first line contains a single integer (T), denoting the number of test cases. Each of the following (T) lines contains two space-separated integers (X) and (Y), representing revenue and cost respectively.

outputFormat

For each test case, output the net profit or loss on a separate line. The net profit or loss is calculated as (X - Y).## sample

3
5000 3000
4000 4000
2000 5000

2000
0
-3000